WO2019128727A1 - High-temperature integrated denitration and dust removing apparatus - Google Patents

High-temperature integrated denitration and dust removing apparatus Download PDF

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Publication number
WO2019128727A1
WO2019128727A1 PCT/CN2018/120890 CN2018120890W WO2019128727A1 WO 2019128727 A1 WO2019128727 A1 WO 2019128727A1 CN 2018120890 W CN2018120890 W CN 2018120890W WO 2019128727 A1 WO2019128727 A1 WO 2019128727A1
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WO
WIPO (PCT)
Prior art keywords
dust removal
denitration
flue
temperature denitration
ply
Prior art date
Application number
PCT/CN2018/120890
Other languages
French (fr)
Chinese (zh)
Inventor
聂华
吴其荣
喻江涛
刘宇
吉庆
范振兴
黎方潜
周川
王进
周川雄
Original Assignee
国家电投集团远达环保工程有限公司重庆科技分公司
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Publication date
Priority to CN201711422428.5A priority Critical patent/CN109954323A/en
Priority to CN201711422428.5 priority
Application filed by 国家电投集团远达环保工程有限公司重庆科技分公司 filed Critical 国家电投集团远达环保工程有限公司重庆科技分公司
Publication of WO2019128727A1 publication Critical patent/WO2019128727A1/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D45/00Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/04Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
    • B01D45/08Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D45/00Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/18Cleaning-out devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/54Nitrogen compounds
    • B01D53/56Nitrogen oxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86Catalytic processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86Catalytic processes
    • B01D53/8621Removing nitrogen compounds
    • B01D53/8625Nitrogen oxides
    • B01D53/8631Processes characterised by a specific device
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86Catalytic processes
    • B01D53/90Injecting reactants

Abstract

A high-temperature integrated denitration and dust removing apparatus (100), comprising: a body (10), which comprises at least a body unit (11), the body unit (11) being a V-shaped plate-like structure, and the body (10) being provided in a flue or a reactor to perform denitration and dust removing on flue gas flowing through; and an ash hopper (20), which is provided outside the flue or the reactor and below the body (10) for collecting dust removed by the body (10).

Description

High-temperature denitration and dust removal integrated equipment Technical field

The invention relates to the field of flue gas purification, and more particularly to an integrated equipment for high temperature denitration and dust removal.

Background technique

With the country's proposal for ultra-low emission of coal, the desulfurization and dedusting technologies in the prior art have been difficult to meet the strict emission targets under ultra-low emission requirements.

In the flue gas denitration system adopting SCR selective catalytic reduction technology in the prior art, high-temperature dust removal is mainly performed based on inertia and gravity deposition, but such high-temperature dust removal device does not have denitration effect at the same time of dust removal, and the dust removal efficiency is low, increasing Large flue resistance, affecting the stability of flue gas flow, and increasing the cost of denitration system operation. In actual use, due to the excessive flow rate of flue gas, the dust removal effect is limited. Therefore, there is an urgent need to develop a high-temperature dust removal and denitration integrated equipment with simple structure, small pressure loss, high dust removal efficiency, and simultaneous denitration.

Summary of the invention

In view of this, the present invention provides an integrated equipment for high temperature denitration and dust removal.

In order to solve the above technical problems, the present invention adopts the following technical solutions:

The high-temperature denitration and dust removal integrated equipment according to an embodiment of the present invention includes:

a body comprising at least one body unit, the body unit being a V-shaped plate-like structure, the body being disposed in a flue or a reactor to denitrate and dedust the flue gas flowing through;

A ash hopper is disposed outside the flue or reactor and below the body to collect dust removed by the body.

Further, the body is composed of a plurality of body units side by side, and the body unit includes:

a bending member comprising two solid rectangular plates closely connected to each other at corresponding edges, the bent portion having a substantially V-shaped cross section;

Two composite members, each of which is formed substantially as a rectangular plate of a porous structure, each composite member being away from an edge opposite the edge to which it is attached, in a plane in which a corresponding rectangular plate of the bent member is located The edges of the tight joints extend in the direction and each composite is used to denitrify and dedust the flue gas.

Further, the bending member is made of FRP, carbon steel or stainless steel.

Further, the composite member has a porous structure, and the compression loss coefficient of the bending member is greater than the pressure loss coefficient of the composite member.

Further, the composite member includes:

a first ply having a porous channel structure and made of a catalyst for performing a denitration reaction;

A second ply having a porous structure and made of a ceramic material or other wear resistant material, the second ply being attached to the first ply.

Further, the first ply is formed of a catalyst material having denitration.

Further, the second layer is made of one or more of corundum, mullite, cordierite, aluminum silicate fiber, and silicon carbide.

Further, the high-temperature denitration and dust removal integrated device further includes: a reverse purge system disposed on a side of the flue or reactor facing the first ply.

Further, an angle between two rectangular plates of each of the bending members is 15° or more and less than 180°.

Further, the body is formed in one or more layers in the flow direction of the flue gas of the flue.

Further, the number of said bodies per layer is set according to the size of the flue or reactor, and generally includes four or more said unit units which are connected to each other and juxtaposed.

Further, the ash hopper is formed in a tapered shape.

The beneficial effects of the above technical solution of the present invention are as follows:

According to the high-temperature denitration and dust removal integrated device of the embodiment of the present invention, the V-shaped plate-shaped body is disposed in the flue or the reactor to remove the dust in the flue or the reactor, and the dust is collected under the body. The ash bucket reduces the running cost by optimizing and improving the existing device. The high-temperature off-load and dust-removing integrated device has small pressure loss and small influence on the flow of the flue gas, and can effectively remove nitrogen in the fly ash and the flue gas at high temperature. Oxide, which can reduce the wear and clogging of the fly ash in the SCR system on the catalyst and subsequent equipment, and improve the overall denitration and dust removal efficiency of the SCR denitration system.

DRAWINGS

1 is a schematic structural view of an integrated equipment for high-temperature denitration and dust removal according to an embodiment of the present invention;

2 is a schematic structural view of a body of an integrated equipment for high-temperature denitration and dust removal according to an embodiment of the present invention.

Reference mark:

High temperature denitration and dust removal integrated equipment 100;

The body 10; the body unit 11; the bending member 12; the composite member 13; the first layer sheet 14; the second layer sheet 15;

Detailed ways

The technical solutions of the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings. It is apparent that the described embodiments are part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the invention are within the scope of the invention.

The high-temperature denitration and dust removal integrated device 100 according to an embodiment of the present invention will be specifically described below with reference to the accompanying drawings.

As shown in FIG. 1, a high temperature denitration and dust removal integrated apparatus 100 according to an embodiment of the present invention includes a body 10 and a hopper 20.

Specifically, the body 10 includes at least one body unit, the body unit is a V-shaped plate-like structure, and the body 10 is disposed in a flue or a reactor to denitrify and remove dust flowing through the flue gas, and the ash hopper 20 is disposed in the flue. Or outside the reactor and below the body 10 to collect the dust removed by the body 10.

In other words, the high-temperature denitration and dust removal integrated device 100 is mainly composed of a body 10 and a hopper 20, wherein the body 10 includes at least one body unit, the body unit is a V-shaped plate, and the body 10 is disposed in a passage through which the smoke flows. Medium, that is to say, the body 10 can be arranged in the flue or the reactor, the flow velocity of the flue gas in the passage is <15 m/s, and the ash bucket 20 is provided below the body 10 and outside the flue or the reactor, and the hopper 20 is used. The dust removed from the body 10 is collected.

Thus, the high-temperature denitration and dust removal integrated apparatus 100 according to the embodiment of the present invention removes the dust in the flue or the reactor by disposing the V-shaped plate-shaped body 10 in the flue or the reactor, and is in the body 10 The ash bucket 20 for collecting dust is provided below, and the operation cost is reduced by optimizing and improving the existing device. The high-temperature off-load dust-removing integrated device 100 has small pressure loss, has little influence on the flow of the flue gas, and can effectively take off at a high temperature. In addition to fly ash, improve the efficiency of the SCR system.

According to an embodiment of the present invention, as shown in FIG. 2, the body 10 is composed of a plurality of body units 11 side by side, and the body unit 11 includes a bending member 12 and two composite members 13. The bending member 12 includes two solid rectangular plates that are closely connected to each other at the corresponding edges, and the cross-section of the bending member 12 is substantially V-shaped, that is, an angle is formed between the two rectangular plates. This structure is very simple. Each of the composite members 13 is formed substantially as a perforated rectangular plate, and each composite member 13 is in a plane in which a corresponding rectangular plate of the bent member 12 is located from an edge opposite to the edge to be tightly joined, away from the edge of the tight connection. extend. That is, each composite member 13 and a corresponding one of the rectangular members 12 are substantially coplanar. The composite member 13 is used for denitration and dust removal of the flue gas, and the number of the unit units 11 is set to be related to the width of the flue or the reactor.

According to still another embodiment of the present invention, the bending member 12 is made of FRP, carbon steel or stainless steel, and the bending member may be a flat layer made of these materials.

Preferably, the composite member 13 is of a porous structure, and the pressure loss coefficient of the bending member 12 is greater than the pressure loss coefficient of the composite member 13.

According to some embodiments of the present invention, as shown in FIG. 2, the composite member 13 is a composite structure and includes a first ply 14 and a second ply 15. The first ply 14 has a porous channel structure and is made of a catalyst for performing a denitration reaction. The porous channel structure is a porous structure having a plurality of channels. The second ply 15 has a porous structure and is made of a ceramic material, and the second ply 15 is attached to the first ply 14 .

Alternatively, the second ply 15 is made of one or more of corundum, mullite, cordierite, aluminum silicate fiber, and silicon carbide.

According to an embodiment of the present invention, the first ply 14 is formed of a Vi 2 O 5 —TiO 2 /WO 3 material and subjected to denitration reaction with nitrogen oxides in the flue gas to achieve a denitration function. The porous ceramic structure of the second layer 15 is used for removing fly ash in the flue gas, thereby achieving the purpose of simultaneous denitration and dust removal of high temperature flue gas, reducing clogging and wear of the catalyst and subsequent equipment in the SCR system, and improving The overall denitration efficiency of the SCR system.

Further, the high-temperature denitration and dust removal integrated device 100 further includes a reverse purge system, the reverse purge system is disposed in the flue or reactor and faces the first layer 14 side, and the back purge system can be steam or sonic purge The system, backflush system is determined based on the ash content of the flue or reactor and its structure.

In one embodiment of the invention, the angle between the two rectangular plates of each bend member 12 is greater than 15° and less than 180°.

Alternatively, one or more of the bodies 10 may be arranged in the direction of flow of the flue gas in the flue, depending on the process requirements.

In accordance with an embodiment of the present invention, each of the layers 10 generally includes four body units 11 interconnected and juxtaposed, the number of which is determined by the width of the flue or reactor.

According to still another embodiment of the present invention, the ash bucket 20 is formed in a tapered shape.

In summary, the high-temperature denitration and dust removal integrated device 100 according to an embodiment of the present invention removes dust in a flue or reactor by disposing the body 10 having a V-shaped plate-shaped body unit in a flue or a reactor. A dust hopper 20 for collecting dust is disposed under the body 10, and the operating cost is reduced by optimizing and improving the existing device. The high-temperature off-load and dust-removing integrated device 100 has small pressure loss, small influence on the flow of the flue gas, and can be at a high temperature. Effectively remove nitrogen oxides from fly ash and flue gas, which can reduce the wear and blockage of fly ash in the SCR system on the catalyst and subsequent equipment, and improve the overall denitration efficiency of the SCR denitration system.

The above is a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It should be considered as the scope of protection of the present invention.

Claims (12)

  1. An integrated equipment for high-temperature denitration and dust removal, characterized in that it comprises:
    a body comprising at least one body unit, the body unit is a V-shaped plate-like structure, and the body is disposed in a flue or a reactor to perform denitration and dust removal on the flowing flue gas;
    A ash hopper is disposed outside the flue or reactor and below the body to collect dust removed by the body.
  2. The high-temperature denitration and dust removal integrated device according to claim 1, wherein the body is composed of a plurality of body units side by side, and the body unit comprises:
    a bending member comprising two solid rectangular plates closely connected to each other at corresponding edges, the bent portion having a substantially V-shaped cross section;
    Two composite members, each of which is formed substantially as a rectangular plate, each composite member being closely spaced from the edge opposite the edge to which it is attached, in a plane in which a corresponding rectangular plate of the bending member is located The direction of the edges extends and each composite is used to denitrify and dedust the flue gas.
  3. The high-temperature denitration and dust removal integrated device according to claim 2, wherein the bent member is made of glass reinforced plastic, carbon steel or stainless steel.
  4. The high-temperature denitration and dust removal integrated device according to claim 2, wherein the composite member has a porous structure, and a pressure loss coefficient of the bent member is greater than a pressure loss coefficient of the composite member.
  5. The high-temperature denitration and dust removal integrated device according to claim 2, wherein the composite member comprises:
    a first ply having a porous channel structure and made of a catalyst for performing a denitration reaction;
    a second ply having a porous structure of a wear resistant material, the second ply being attached to the first ply.
  6. The high-temperature denitration and dust removal integrated device according to claim 5, wherein the first ply is formed of a catalyst material having denitration.
  7. The high-temperature denitration and dust removal integrated device according to claim 5, wherein the second layer is made of one or more of corundum, mullite, cordierite, aluminum silicate fiber and silicon carbide. Made.
  8. The high-temperature denitration and dust removal integrated device according to claim 5, further comprising:
    A back purge system is provided on the side of the flue or reactor facing the first ply.
  9. The high-temperature denitration and dust removal integrated device according to claim 2, wherein an angle between two rectangular plates of each of the bent members is 15° or more and less than 180°.
  10. The high-temperature denitration and dust removal integrated device according to claim 2, wherein the body is formed in one or more layers in a flow direction of the flue gas of the flue.
  11. The high-temperature denitration and dust removal integrated device according to claim 8, wherein the number of said bodies in each layer is set according to a flue or a reactor size, and generally includes four or more said mutually connected and juxtaposed said Body unit.
  12. The high-temperature denitration and dust removal integrated device according to claim 1, wherein the ash hopper is formed in a tapered shape.
PCT/CN2018/120890 2017-12-25 2018-12-13 High-temperature integrated denitration and dust removing apparatus WO2019128727A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201711422428.5A CN109954323A (en) 2017-12-25 2017-12-25 A kind of high temperature denitration dust collecting integral equipment
CN201711422428.5 2017-12-25

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Publication Number Publication Date
WO2019128727A1 true WO2019128727A1 (en) 2019-07-04

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WO (1) WO2019128727A1 (en)

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JP2003112015A (en) * 2001-10-05 2003-04-15 Babcock Hitachi Kk Denitration reactor
CN102125797A (en) * 2011-02-23 2011-07-20 张继兴 Integrated device for realizing high-efficiency dust removal, desulfurization and denitrification
CN203458970U (en) * 2013-08-27 2014-03-05 国家粮食储备局郑州科学研究设计院 Boiler tail gas treatment device with smoke gas filter column
CN103877843A (en) * 2014-03-31 2014-06-25 邹炎 Broad spectrum smoke purifying device and process
CN205032035U (en) * 2015-09-22 2016-02-17 梁成 Electronic dust removal and desulfurization device of rotation type
CN205235748U (en) * 2015-12-09 2016-05-18 常州大学 Swash plate desulfurization increase ware suitable for wet flue gas desulfurization

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CN101732931A (en) * 2008-11-24 2010-06-16 河南中新环保物流设备有限公司 Dust collector
CN201949738U (en) * 2010-12-03 2011-08-31 东辰控股集团有限公司 Device for filtering and collecting dust vapor liquid
CN203208806U (en) * 2013-05-06 2013-09-25 上海洁昊环保设备有限公司 Demister set
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CN104785020B (en) * 2015-03-31 2016-04-20 山东鑫源环保工程技术有限公司 A kind of SCR denitrating flue gas pre-dedusting device
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003112015A (en) * 2001-10-05 2003-04-15 Babcock Hitachi Kk Denitration reactor
CN102125797A (en) * 2011-02-23 2011-07-20 张继兴 Integrated device for realizing high-efficiency dust removal, desulfurization and denitrification
CN203458970U (en) * 2013-08-27 2014-03-05 国家粮食储备局郑州科学研究设计院 Boiler tail gas treatment device with smoke gas filter column
CN103877843A (en) * 2014-03-31 2014-06-25 邹炎 Broad spectrum smoke purifying device and process
CN205032035U (en) * 2015-09-22 2016-02-17 梁成 Electronic dust removal and desulfurization device of rotation type
CN205235748U (en) * 2015-12-09 2016-05-18 常州大学 Swash plate desulfurization increase ware suitable for wet flue gas desulfurization

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